| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2008-2009 coresystems GmbH |
| * Copyright (C) 2015 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc. |
| */ |
| |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <cpu/x86/smm.h> |
| #include <elog.h> |
| #include <ec/google/chromeec/ec.h> |
| #include <soc/iomap.h> |
| #include <soc/nvs.h> |
| #include <soc/pm.h> |
| #include <soc/smm.h> |
| #include "ec.h" |
| |
| int mainboard_io_trap_handler(int smif) |
| { |
| switch (smif) { |
| case 0x99: |
| printk(BIOS_DEBUG, "Sample\n"); |
| smm_get_gnvs()->smif = 0; |
| break; |
| default: |
| return 0; |
| } |
| |
| /* On success, the IO Trap Handler returns 0 |
| * On failure, the IO Trap Handler returns a value != 0 |
| * |
| * For now, we force the return value to 0 and log all traps to |
| * see what's going on. |
| */ |
| return 1; |
| } |
| |
| static u8 mainboard_smi_ec(void) |
| { |
| u8 cmd = 0; |
| #if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC) |
| u32 pm1_cnt; |
| cmd = google_chromeec_get_event(); |
| |
| /* Log this event */ |
| if (IS_ENABLED(CONFIG_ELOG_GSMI) && cmd) |
| elog_add_event_byte(ELOG_TYPE_EC_EVENT, cmd); |
| |
| switch (cmd) { |
| case EC_HOST_EVENT_LID_CLOSED: |
| printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n"); |
| |
| /* Go to S5 */ |
| pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT); |
| pm1_cnt |= (0xf << 10); |
| outl(pm1_cnt, ACPI_BASE_ADDRESS + PM1_CNT); |
| break; |
| } |
| #endif |
| return cmd; |
| } |
| |
| void mainboard_smi_gpi_handler(const struct gpi_status *sts) |
| { |
| if (gpi_status_get(sts, EC_SMI_GPI)) { |
| /* Process all pending events */ |
| while (mainboard_smi_ec() != 0) |
| ; |
| } |
| } |
| |
| void mainboard_smi_sleep(u8 slp_typ) |
| { |
| #if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC) |
| /* Disable USB charging if required */ |
| switch (slp_typ) { |
| case 3: |
| if (smm_get_gnvs()->s3u0 == 0) { |
| google_chromeec_set_usb_charge_mode( |
| 0, USB_CHARGE_MODE_DISABLED); |
| google_chromeec_set_usb_charge_mode( |
| 1, USB_CHARGE_MODE_DISABLED); |
| } |
| |
| /* Enable wake events */ |
| google_chromeec_set_wake_mask(MAINBOARD_EC_S3_WAKE_EVENTS); |
| break; |
| case 5: |
| if (smm_get_gnvs()->s5u0 == 0) { |
| google_chromeec_set_usb_charge_mode( |
| 0, USB_CHARGE_MODE_DISABLED); |
| google_chromeec_set_usb_charge_mode( |
| 1, USB_CHARGE_MODE_DISABLED); |
| } |
| |
| /* Enable wake events */ |
| google_chromeec_set_wake_mask(MAINBOARD_EC_S5_WAKE_EVENTS); |
| break; |
| } |
| |
| /* Disable SCI and SMI events */ |
| google_chromeec_set_smi_mask(0); |
| google_chromeec_set_sci_mask(0); |
| |
| /* Clear pending events that may trigger immediate wake */ |
| while (google_chromeec_get_event() != 0) |
| ; |
| #endif |
| } |
| |
| int mainboard_smi_apmc(u8 apmc) |
| { |
| #if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC) |
| switch (apmc) { |
| case APM_CNT_ACPI_ENABLE: |
| google_chromeec_set_smi_mask(0); |
| /* Clear all pending events */ |
| while (google_chromeec_get_event() != 0) |
| ; |
| google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS); |
| break; |
| case APM_CNT_ACPI_DISABLE: |
| google_chromeec_set_sci_mask(0); |
| /* Clear all pending events */ |
| while (google_chromeec_get_event() != 0) |
| ; |
| google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS); |
| break; |
| } |
| #endif |
| return 0; |
| } |